Impact wrench



FIG. 1 is a front perspective view of an impact wrench embodying our new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the impact wrench that form no part of the claimed design. 

CLAIM The ornamental design for an impact wrench, as shown and described. 